Abstract: Making mineral admixtures and recycled aggregate into cement products is an important way for wastes recycling. In order to research the influence of mineral admixtures and recycled aggregate on the strength and shrinkage of cement, different replacement rates of mineral admixtures and recycled aggregate were designed, followed by strength, drying shrinkage and autogenous shrinkage experiments in varied ages. The results show that fly ash reduces the strength, while mineral powder increases the post strength. Fly ash and mineral powder reduce the drying shrinkage, while increase the autogenous shrinkage of cement. Recycled aggregate improves the strength, but has little influence on the shrinkage of cement.

Key words: mineral admixture;recycled aggregate;strength;drying shrinkage;autogenous shrinkage